Alert archive / Illinois / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 187, NWS Lincoln, IL

July 22, 1998Mason County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 22, 1998, 12:00 PM CDT for Mason County, Illinois. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 22, 1998, 12:00 PM CDT (17:00 UTC)
Expired: Jul 22, 1998, 12:45 PM CDT
In force: 45 min
Issued by: NWS Lincoln, IL
Area: Whole counties

County Mason County, IL

The radar

The Lincoln radar (KILX), 50 km from the middle of the area, began a volume at 17:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.0 hours before the alert went out and 112 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 407 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 1052 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -70 m²/s²
0-3 km storm-relative helicity: -37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

505 
WUUS1 KSPI 221703 RRA
SVRSPI
ILC125-221745-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1200 PM CDT WED JUL 22 1998

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN MASON COUNTY IN CENTRAL ILLINOIS

* UNTIL 1245 PM CDT

* AT NOON CDT...LINCOLN DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  7 MILES WEST NORTHWEST OF CHANDLERVILLE...MOVING EAST AT 30 MPH.

* THIS STORM IS EXPECTED TO AFFECT AREAS AROUND...
  SNICARTE
  KILBOURNE

DAMAGING WIND GUSTS OF 60 MPH OR HIGHER WILL ACCOMPANY THIS STORM.
MOVE TO A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

JLA/CJM

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 22, 2:08 AM CDT, 9 hours 52 minutes earlier.

Area forecast discussion, Jul 22, 2:08 AM CDT, 9 hours 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
208 AM CDT WED JUL 22 1998

WITH SF DRAPED ACROSS NRN IL FROM JUST S OF ORD THEN INTO SRN
IA...RW/TRW ACTIVITY IS QUITE WIDESPREAD ALONG AND N OF BOUNDARY THIS
MORNING. CURRENT ACTIVITY IS ONLY AFFECTING NRN THREE COUNTIES OF CWA.

FOR TODAY...TRW ACTIVITY WILL SLOWLY SINK TO THE S WITH THE FRONT...
THO MOST OF PCPN WILL STAY OVER NRN COUNTIES. REST OF CWA STILL HAS A
CHANCE OF PCPN BUT FOR THE MOST PART SHOULD REMAIN DRY. DESPITE SOME
CLD CVRIN THESE AREAS...TEMPS STILL WILL REACH THE LOWER TO MIDDLE 90S
WITH DEWPTS IN THE 70S...SO KEEP HEAT ADVISORY GOING FOR AREAS ALONG
AND SOUTH OF A SCHUYLER COUNTY TO VERMILION COUNTY LINE TODAY.

TONIGHT...ANOTHER ROUND OF MCS ACTIVITY WILL FIRE ALONG THE FRONT AS IT
SINKS SLOWLY TO THE S...WITH HEAVIEST AMOUNTS OVER CNTRL PTNS OF CWA.

PIA   88/70  +6
SPI   91/71  46
DEC   92/71  46
CMI   92/71  46
LWV   95/73  34

BYRD

V

In the hours before

Special weather statement, Jul 22, 6:20 AM CDT, 5 hours 40 minutes before

ILZ027>031-036>038-040>057-061>063-066>068-071>073-231100-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
620 AM CDT WED JUL 22 1998

A FRONTAL BOUNDARY OVER NORTHERN ILLINOIS WILL SLOWLY MOVE TO THE
SOUTH TODAY AND HELP TRIGGER THUNDERSTORMS TODAY AND INTO THE
OVERNIGHT HOURS ACROSS CENTRAL ILLINOIS.

SOME OF THE STORMS MAY BECOME SEVERE MAINLY ALONG AND NORTH OF A
LINE FROM ST. LOUIS MISSOURI TO INDIANAPOLIS INDIANA. AS A
RESULT...SPOTTER ACTIVATION MAY BE NECESSARY IN THESE LOCATIONS.

BYRD

Special weather statement, Jul 22, 6:20 AM CDT, 5 hours 40 minutes before

ILZ027>031-036>038-040>057-061>063-066>068-071>073-231100-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
620 AM CDT WED JUL 22 1998

A FRONTAL BOUNDARY OVER NORTHERN ILLINOIS WILL SLOWLY MOVE TO THE
SOUTH TODAY AND HELP TRIGGER THUNDERSTORMS TODAY AND INTO THE
OVERNIGHT HOURS ACROSS CENTRAL ILLINOIS.

SOME OF THE STORMS MAY BECOME SEVERE MAINLY ALONG AND NORTH OF A
LINE FROM ST. LOUIS MISSOURI TO INDIANAPOLIS INDIANA. AS A
RESULT...SPOTTER ACTIVATION MAY BE NECESSARY IN THESE LOCATIONS.

BYRD

Special weather statement, Jul 22, 11:00 AM CDT, 1 hour before

ILZ027>031-036>038-040>057-061>063-066>068-071>073-231100-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
1100 AM CDT WED JUL 22 1998

A FRONTAL BOUNDARY OVER NORTHERN ILLINOIS WILL SLOWLY MOVE TO THE
SOUTH TODAY AND HELP TRIGGER THUNDERSTORMS TODAY AND INTO THE
OVERNIGHT HOURS ACROSS CENTRAL ILLINOIS.

SOME OF THE STORMS MAY BECOME SEVERE...MAINLY ALONG AND NORTH OF A
LINE FROM ST. LOUIS MISSOURI TO INDIANAPOLIS INDIANA. AS A
RESfULT...SPOTTER ACTIVATION MAY BE NECESSARY IN THESE LOCATIONS.

PALMER

Special weather statement, Jul 22, 11:00 AM CDT, 1 hour before

ILZ027>031-036>038-040>057-061>063-066>068-071>073-231100-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
1100 AM CDT WED JUL 22 1998

A FRONTAL BOUNDARY OVER NORTHERN ILLINOIS WILL SLOWLY MOVE TO THE
SOUTH TODAY AND HELP TRIGGER THUNDERSTORMS TODAY AND INTO THE
OVERNIGHT HOURS ACROSS CENTRAL ILLINOIS.

SOME OF THE STORMS MAY BECOME SEVERE...MAINLY ALONG AND NORTH OF A
LINE FROM ST. LOUIS MISSOURI TO INDIANAPOLIS INDIANA. AS A
RESfULT...SPOTTER ACTIVATION MAY BE NECESSARY IN THESE LOCATIONS.

PALMER

Local storm report, Jul 22, 11:53 AM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
1153 AM CDT WED JUL 22 1998

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0850 AM    HAVANA                    IL    WIND DAMAGE
07/22/98   MASON                           TREES AND POWER LINES
                                           DOWN IN BATH...ALONG
                                           ROUTE 78 BETWEEN BATH
                                           AND HAVANNA...AND IN
                                           HAVANNA

1130 AM    RUSHVILLE                 IL    60 MPH TSTM GUST
07/22/98   SCHUYLER                        TREE LIMBS BLOWN DOWN
                                           AND POWER LINES DOWN

GOETSCH

Local storm report, Jul 22, 11:53 AM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
1153 AM CDT WED JUL 22 1998

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0850 AM    HAVANA                    IL    WIND DAMAGE
07/22/98   MASON                           TREES AND POWER LINES
                                           DOWN IN BATH...ALONG
                                           ROUTE 78 BETWEEN BATH
                                           AND HAVANNA...AND IN
                                           HAVANNA

1130 AM    RUSHVILLE                 IL    60 MPH TSTM GUST
07/22/98   SCHUYLER                        TREE LIMBS BLOWN DOWN
                                           AND POWER LINES DOWN

GOETSCH

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 22, 9:29 AM CDT	Severe Thunderstorm Warning	ILX	Logan, Mason, Tazewell	61 min
Jul 22, 10:00 AM CDT	Severe Thunderstorm Warning	ILX	McLean	60 min
Jul 22, 11:26 AM CDT	Severe Thunderstorm Warning	ILX	Schuyler	34 min
Jul 22, 11:46 AM CDT	Severe Thunderstorm Warning	ILX	Cass	44 min
Jul 22, 12:27 PM CDT	Severe Thunderstorm Warning	ILX	Menard	48 min
Jul 22, 1:00 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Sangamon	60 min
Jul 22, 1:33 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Macon	57 min
Jul 22, 1:55 PM CDT	Severe Thunderstorm Warning	ILX	Piatt	50 min
Jul 22, 2:28 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas	62 min
Jul 22, 2:55 PM CDT	Severe Thunderstorm Warning	ILX	Edgar, Vermilion	65 min
Jul 22, 4:01 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	34 min
Jul 22, 5:56 PM CDT	Severe Thunderstorm Warning	ILX	Clark	64 min
Jul 22, 6:16 PM CDT	Severe Thunderstorm Warning	ILX	Effingham	59 min
Jul 22, 6:27 PM CDT	Severe Thunderstorm Warning	ILX	Jasper	63 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1998 Every severe thunderstorm warning in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.